Clasp



Sept. 9, 1930. s. A. JOHNSON CLA SP Filed Jan. 50, 1929 IIIHIIIIHHIII Hllllllllllllllllllllllll INVEN TOR.

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a 92mm @4440 Lil Patented Sept. 9, 1930 PATENT OFFICE CLASP Application filed January 30, 1929. Serial No. 336,265.

This invention relates to a clasp of the type which is especially adapted to secure together two parts of a ribbon band or bracelet used for securing a wrist watch to the arm of the wearer; and has for its object to provide a clasp which shall be positive in its operation and of ornamental appearance and yet be of a construction inexpensive to manufacture.

A further object of the invention is to provide a construction which may be formed by a minimum number of foot press operations and one which will be light in weight although employing suificient amount of material to completely conceal the resilient spring used for snapping the parts together.

. A still further object of the invention is the provision of a construction in which the securing means and its housing may he always 7 of the same size to be utilized with varying widths of clasps for different widths of ribbon bands.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is a top plan view of the clasp and a portion of ribbon secured thereby.

Fig. 2 is a perspective View of the sheet metal frame plate of the socket member.

ig. 3 is a perspective View of the blanked out housing member.

Fig. 4 is a perspective view of the housing member bent into box or trough shape.

Fig. 5 is a top plan View of the housing I member of Fig. 4.

Fig. 6 is a member.

7 Fig. 7 shows the spring within the housing member.

Fig. 8 shows the housing member and plate member in assembled position looking at one side thereof. a

Fig. 9 is a perspective view of the socket member before the arms or extending portions of the housing member are bent over the opposite side of the plate from that shown in Fig. 8

Fig. 10 is a section on line 101O of Fig.

perspective view of the spring 9, the arms or extending portions being bent over to engage the opposite side of the plate. Fig. 11 is a sect-ion on line 11ll of Fig. 10. Fig. 12 is a section of the stud member.

mem tion.

In the use of ribbon bands for securing a wrist watch in position on the wrist of the wearer, it is desirable to prising stud and socket members, one of which may be secured to an end of the rib bon and the other adjustably secured along the strap so that it may assume different positions to accommodate wrists of different sizes and in order to provide such a construction of sheet metal which shall be light in weight and yet be strong and durable and handsome in appearance, I have provided a construction which can be made by the minimum number of foot press operations, to blank and bend sheet stock into suitable form to strengthen it and conceal and retain a separate tempered spring in place; and the following is a detailed description of the present embodiment of this invention illustrating the preferred means by which these advantageous results may be accomplished With reference to the drawings, the socket member consists of a sheet metal frame plate member 15, which may be cut from sheet stool: into the shape illustrated in Fig. 2, having slots 16 adjacent its ends of a width to r ceive a ribbon 17 woven in and out of the slots to adjustably secure the same thereto. An intermediate slot 18 is formed between the two ribbon slots 16 to receive a portion of the stud member, as will be presently described.

The socket member is also provided with a housing part 19 which is blanked out, as illustrated in Fig. 3, and bent into trough or box form, as illustrated in Fig. 4, having an outer wall 20, side walls 21 and end walls 22, each of the latter of which has a reduced extending portion or arm 28 to pass through notches 24 in the sides of the frame plate member 15, to be folded over the opposite side of the plate to secure the housing member thereto, with its side and end walls snugly r and socket member in clasped rela- Fig. 13is a sectional view showing the stud e provide a clasp comabutting one of the surfaces of the plate as is clearly apparent from the illustration.

The outer wall of the housing member is slotted as at to substantially register with the slot 18 in the frame plate and a U-shaped spring 26, having a pair of arms 27, is confined within the housingmember between its outer wall 20 and the frame member and heldin the desired position by the end and sidewalls of the housing so as to resiliently engage the projecting portion 28 of a stud member extending from a top metal plate 29 to frictionally the stud and socket members in. clasped position.

The projection has an. enlarged head 30, as will'be clearly apparent from Fig. 13, so as to offer greater resistance to the separation of the stud and socket members clasped position. The projection 28 is set into a recess 31 in the plate 29 and-held therein by any suitable means such as solder 32.

Various widths of stud and socket plate members are made, for difl erent width ribbons, but by the i construction shown the identical same size of housing may be used regardless of the different widths of stud and socket plates by notching the frame plate to the desired depth so that the space left between the notches will always be the same dimension.

It will also be apparent that this housing member completely conceals the spring which is unsightly from an artistic standpoint in an article of jewelry of this character, while the bending of the housing into the trough, box or channel shape illustrated adds sulficient strength to the same so that it may made of very thin, light stock and'yet be sufficiently strong which it is ordinarily subjected.

The foregoing description is directed solely towards the construction illustrated, but I desire it tobe understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible,

the invention being defined and limited only by the terms of the appended claims.

I claim:

1. A clasp comprising a plate member having a slot to receive a ribbon, a stud having an enlarged head projecting therefrom, a

second platemember having; a pair of spaced slots to adj ustably receive a ribbon, a troughshap'ed housing member of a width lessthan the distance between said slots secured to said plate member between said slots, a gene erally iJ-shaped spring confined within the space between said housing member and plate, said stud when inserted therethru.

2. A clasp comprising a stud member and a socket member, each adapted to be secured to a ribbon band, said socket member comprising; aflat sheet metal frame having housing and engaged and resiliently hold when in to withstand any abuse to and a slot in said housing to receive frame to lock the housing in assembled relation to form a housing,'and a springwithin. said by said frame and said housing member whereby the movement Lof said spring is limitedito a lateralidis'placement, said housing ing slot to receive part. of said stud member.

"3. A clasp comprising a plate member having a slot to receive aribbon,

a second plate member having a pair of spaced slots to V v v and an intermed ate slot, a trough-shaped housing member having an outer. wall and.

memberlhiavinganenter j a stud h aving an enlarged headprojecting therefrom,-

adj ustably receive a ribbon confined within the space between said housmember and plate member and in a position to resiliently engage said stud when inserted through said slots to retainit therein. said second platehaving notches'on its side edges and said side walls of said'housing member having, extending portions topass through said notchesand engage the op poside of said plate member to hold said member in position. i i

i. A clasp comprising a stud member and a socket member, each adapted to be secured to a ribbon band, said socket member comprising a flat sheet metal frame having notched side edges, a trough-shaped sheet metal housing member at one side of said frame, arms on said housing member in said notches and extendingoverthe opposite side of the frame to lock the housing member and frame in assembled relation, a spring within 7 said housing, and said housing-having an entering slot to receive a part of said stud l 

